Finding the Fourth Proportional to 50,172.09, 69,238.02 and 28,664.70

Step by Step Solution

1. Step 1: Write the proportion equation
   50,172.09 : 69,238.02 = 28,664.70 : x
2. Step 2: Convert to fraction form
   50,172.09/69,238.02 = 28,664.70/x
3. Step 3: Cross multiply
   50,172.09x = 69,238.02 × 28,664.70
4. Step 4: Simplify right side
   50,172.09x = 1,984,687,071.89
5. Step 5: Solve for x
   x = 1,984,687,071.89/50,172.09
6. Step 6: Final answer
   x = 39,557.59